AWWA COMMENT PERIOD ON AWWA C224 – Nylon-11-Based Polyamide Coatings and Linings for Steel Water Pipe and Fittings

AWWA COMMENT PERIOD ON AWWA C224 – Nylon-11-Based Polyamide Coatings and Linings for Steel Water Pipe and Fittings
January 18, 2024

AWWA solicits public comments on all proposed new AWWA Standards, and on all proposed revisions, reaffirmations, or withdrawals of existing AWWA Standards. The referenced standards project is being considered for approval and the publication of this notice begins the 45-day public comment period for AWWA and ANSI. An electronic public review copy of the proposed standard can be obtained for review during the comment period by emailing ETS Support (ETSsupport@awwa.org). Comments must be submitted in writing to the AWWA contact listed below no later than the last day of the comment period specified herein. Such comments shall be specific to the section(s) of the standard under review and include sufficient detail so as to enable the reader to understand the commenter’s position, concerns and suggested alternative language, if appropriate.

AWWA Comment Period closes on March 4, 2024.

Send comments to:
Liz Ralph, LRalph@awwa.org
303.347.6177 phone

The review copy will be edited for publication and may also be revised as appropriate based on any comments received during the public comment period. Therefore, this copy is not suitable for continued utilization and is intended only for comment purposes.

Final publication of the standard may take several months. When it is available, a notice will be published in the official notice section of Journal – American Water Works Association. The standard becomes an effective AWWA standard on the first day of the month following such publication in Journal – American Water Works Association.

SCOPE

This standard describes Nylon-11-based polyamide systems for coating and lining and coating of steel pipe, connections, fittings, and special sections (articles) that are used in water-handling equipment that is installed aboveground, belowground, or underwater. Polyamide systems are thermoplastic and are ordinarily applied in a shop or manufacturing facility.

MAJOR REVISIONS

Major revisions made to the standard in this revision include the following:

1. Updated Sec. I.C. Acceptance in the Foreword with the latest Standards Council language reflecting the addition of reference to NSF/ANSI/CAN 372 and NSF/ANSI/CAN 600.
2. Added Sec 1.1.3 Other substrates to be consistent with recent changes to similar coatings and linings standards.
3. Added reference to NSF/ANSI/CAN 600 in Section 2 References and Section 4.2.2.
4. Added the definition of rotocoating to Sec. 3 Definitions.
5. Updated Sec. 4.2.1 Materials with the latest Standards Council boilerplate language.
6. Moved 4.3.1.1 Shelf life and storage information to Sec. 6 to match formatting of similar coatings and linings standards.
7. Moved Tables 1, 2 and 3 to Sec.5 to match formatting of similar coatings and linings standards.
8. Reformatted section 4.4 Surface Preparation to be consistent with recent changes to similar coatings and linings standards. The reformatting did not change the minimum surface cleanliness requirements.
9. Added Section 4.5.1 Primer application.
10. Expanded Sec 4.5.2 to include more details on different application methods.
11. Added Sec 4.6 Coating Fitting and Specials.
12. Added Sec 4.9.2 Protection during welding.
13. Table 1: Reduced minimum particle size of fluidized bed grade from 104 μm to 95 μm. This change was made to be inclusive of existing commercial systems.
14. Added specimen details to Sec 5.2.2.1
15. Table 2: Reduced minimum Shore D hardness from 70 to 65. This change was made to be inclusive of existing commercial systems.